GENERIC 7.0-CURRENT from Nov 14 16:00 UTC, vmcore.17
Test with corrupted UFS2 file system (bad super block).
KDB: debugger backends: ddb
KDB: current backend: ddb
Copyright (c) 1992-2005 The FreeBSD Project.
Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994
The Regents of the University of California. All rights reserved.
FreeBSD 7.0-CURRENT #16: Mon Nov 14 17:19:26 CET 2005
pho@crashbox.osted.lan:/usr/src/sys/i386/compile/PHO
WARNING: WITNESS option enabled, expect reduced performance.
ACPI APIC Table: <A M I OEMAPIC >
Timecounter "i8254" frequency 1193182 Hz quality 0
CPU: Intel(R) XEON(TM) CPU 1.80GHz (1799.81-MHz 686-class CPU)
Origin = "GenuineIntel" Id = 0xf24 Stepping = 4
Features=0x3febfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CLFLUSH,DTS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM>
Logical CPUs per core: 2
real memory = 1073676288 (1023 MB)
avail memory = 1041006592 (992 MB)
:
Trying to mount root from ufs:/dev/ad0s1a
fxp0: link state changed to UP
/mnt: mount pending error: blocks 137438953472 files 0
/mnt: mount pending error: blocks 0 files 4194304
g_vfs_done():md0c[READ(offset=549755904000, length=8192)]error = 5
panic: mount: lost mount
cpuid = 0
KDB: enter: panic
[thread pid 4282 tid 100125 ]
Stopped at kdb_enter+0x2b: nop
db> where
Tracing pid 4282 tid 100125 td 0xc5341180
kdb_enter(c0872545) at kdb_enter+0x2b
panic(c087b3ae,0,0,c541a414,9) at panic+0x14b
vfs_domount(c5341180,c4cb8bc0,c4c3bc70,0,c5544160) at vfs_domount+0x827
vfs_donmount(c5341180,0,e7701ba8,c4e55180,e) at vfs_donmount+0x135
kernel_mount(c4f152b0,0,804f030,0,fffffffe) at kernel_mount+0x6d
ffs_cmount(c4f152b0,bfbfde50,0,c5341180,c0913120) at ffs_cmount+0x5d
mount(c5341180,e7701d04,c,c5341180,e7701d30) at mount+0x156
syscall(3b,3b,3b,804ae3f,bfbfe914) at syscall+0x27e
Xint0x80_syscall() at Xint0x80_syscall+0x1f
--- syscall (21, FreeBSD ELF32, mount), eip = 0x280c140f, esp = 0xbfbfde2c, ebp = 0xbfbfdec8 ---
db> shpw pcpu
No such command
db> show pcpu
cpuid = 0
curthread = 0xc5341180: pid 4282 "mount"
curpcb = 0xe7701d90
fpcurthread = none
idlethread = 0xc4aefa80: pid 13 "idle: cpu0"
APIC ID = 0
currentldt = 0x50
spin locks held:
db> call doadump
Dumping 1023 MB (2 chunks)
chunk 0: 1MB (159 pages) ... ok
chunk 1: 1023MB (261872 pages) 1007 991 975 959 943 927 911 895 879 863 847 831 815 799 783 767 751 735 719 703 687 671 655 639 623 607 591 575 559 543 527 511 495 479 463 447 431 415 399 383 367 351 335 319 303 287 271 255 239 223 207 191 175 159 143 127 111 95 79 63 47 31 15 ... ok
Dump complete
= 0xf
db> reset
(kgdb) bt
#0 doadump () at pcpu.h:165
#1 0xc046a3a3 in db_fncall (dummy1=0xc09b6e60, dummy2=0x0, dummy3=0x0, dummy4=0xe7701828 "T\030pç| \207~À@\030pçD\030pç\220\a")
at ../../../ddb/db_command.c:489
#2 0xc046a1a8 in db_command (last_cmdp=0xc0923ce4, cmd_table=0x0, aux_cmd_tablep=0xc089e0a4, aux_cmd_tablep_end=0xc089e0c0)
at ../../../ddb/db_command.c:404
#3 0xc046a270 in db_command_loop () at ../../../ddb/db_command.c:455
#4 0xc046be89 in db_trap (type=0x3, code=0x0) at ../../../ddb/db_main.c:228
#5 0xc0660924 in kdb_trap (type=0x3, code=0x0, tf=0xe77019c0) at ../../../kern/subr_kdb.c:485
#6 0xc0806924 in trap (frame=
{tf_fs = 0xe7700008, tf_es = 0xc0660028, tf_ds = 0xc0870028, tf_edi = 0xc087b3ae, tf_esi = 0x1, tf_ebp = 0xe7701a00, tf_isp = 0xe77019ec, tf_ebx = 0xe7701a2c, tf_edx = 0x0, tf_ecx = 0xc1033000, tf_eax = 0x12, tf_trapno = 0x3, tf_err = 0x0, tf_eip = 0xc066062b, tf_cs = 0x20, tf_eflags = 0x296, tf_esp = 0xe7701a20, tf_ss = 0xc064688f}) at ../../../i386/i386/trap.c:612
#7 0xc07f380a in calltrap () at ../../../i386/i386/exception.s:139
#8 0xc066062b in kdb_enter (msg=0x12 <Address 0x12 out of bounds>) at cpufunc.h:60
#9 0xc064688f in panic (fmt=0xc087b3ae "mount: lost mount") at ../../../kern/kern_shutdown.c:549
#10 0xc0698b8b in vfs_domount (td=0xc5341180, fstype=0xc0913120 " \001f\031ufs", fspath=0xc4c3bc70 "/mnt", fsflags=0xc541a4dc,
fsdata=0xc5544160) at ../../../kern/vfs_mount.c:827
#11 0xc0698189 in vfs_donmount (td=0xc5341180, fsflags=0x0, fsoptions=0xe7701ba8) at ../../../kern/vfs_mount.c:529
#12 0xc069a395 in kernel_mount (ma=0xc4f152b0, flags=0x0) at pcpu.h:162
#13 0xc07838fd in ffs_cmount (ma=0xc4f152b0, data=0xc1033000, flags=0x0, td=0xc5341180) at ../../../ufs/ffs/ffs_vfsops.c:382
#14 0xc0698352 in mount (td=0xc5341180, uap=0xe7701d04) at ../../../kern/vfs_mount.c:603
#15 0xc080718a in syscall (frame=
{tf_fs = 0x3b, tf_es = 0x3b, tf_ds = 0x3b, tf_edi = 0x804ae3f, tf_esi = 0xbfbfe914, tf_ebp = 0xbfbfdec8, tf_isp = 0xe7701d64, tf_ebx = 0x804f050, tf_edx = 0x0, tf_ecx = 0x1, tf_eax = 0x15, tf_trapno = 0xc, tf_err = 0x2, tf_eip = 0x280c140f, tf_cs = 0x33, tf_eflags = 0x246, tf_esp = 0xbfbfde2c, tf_ss = 0x3b}) at ../../../i386/i386/trap.c:1003
#16 0xc07f385f in Xint0x80_syscall () at ../../../i386/i386/exception.s:200
#17 0x00000033 in ?? ()
Previous frame inner to this frame (corrupt stack?)
(kgdb) f 10
#10 0xc0698b8b in vfs_domount (td=0xc5341180, fstype=0xc0913120 " \001f\031ufs", fspath=0xc4c3bc70 "/mnt", fsflags=0xc541a4dc,
fsdata=0xc5544160) at ../../../kern/vfs_mount.c:827
827 panic("mount: lost mount");
(kgdb) l
822 mtx_lock(&mountlist_mtx);
823 TAILQ_INSERT_TAIL(&mountlist, mp, mnt_list);
824 mtx_unlock(&mountlist_mtx);
825 vfs_event_signal(NULL, VQ_MOUNT, 0);
826 if (VFS_ROOT(mp, LK_EXCLUSIVE, &newdp, td))
827 panic("mount: lost mount");
828 mountcheckdirs(vp, newdp);
829 vput(newdp);
830 VOP_UNLOCK(vp, 0, td);
831 if ((mp->mnt_flag & MNT_RDONLY) == 0)
(kgdb) info loc
newdp = (struct vnode *) 0x9
vp = (struct vnode *) 0xc541a414
mp = (struct mount *) 0xc4f1b000
vfsp = (struct vfsconf *) 0xc0913120
error = 0x0
flag = 0x0
kern_flag = 0x0
va = {va_type = VDIR, va_mode = 0x1ed, va_nlink = 0x2, va_uid = 0x0, va_gid = 0x0, va_fsid = 0x50, va_fileid = 0x6, va_size = 0x200,
va_blocksize = 0x4000, va_atime = {tv_sec = 0x4378d2fe, tv_nsec = 0x0}, va_mtime = {tv_sec = 0x43496a44, tv_nsec = 0x0}, va_ctime = {
tv_sec = 0x434f6192, tv_nsec = 0x0}, va_birthtime = {tv_sec = 0x43496a44, tv_nsec = 0x0}, va_gen = 0xc790cf43, va_flags = 0x0,
va_rdev = 0x843, va_bytes = 0x800, va_filerev = 0x3fd0350d7a, va_vaflags = 0xc093d020, va_spare = 0x210}
nd = {ni_dirp = 0xc4c3bc70 "/mnt", ni_segflg = UIO_SYSSPACE, ni_startdir = 0x0, ni_rootdir = 0xc4e732b8, ni_topdir = 0x0,
ni_vp = 0xc541a414, ni_dvp = 0xc4e732b8, ni_pathlen = 0x1, ni_next = 0xc55c7004 "", ni_loopcnt = 0x0, ni_cnd = {cn_nameiop = 0x0,
cn_flags = 0xc044, cn_thread = 0xc5341180, cn_cred = 0xc5258400, cn_lkflags = 0x2, cn_pnbuf = 0xc55c7000 "/mnt",
cn_nameptr = 0xc55c7001 "mnt", cn_namelen = 0x3, cn_consume = 0x0}}
(kgdb) up
#11 0xc0698189 in vfs_donmount (td=0xc5341180, fsflags=0x0, fsoptions=0xe7701ba8) at ../../../kern/vfs_mount.c:529
529 error = vfs_domount(td, fstype, fspath, fsflags, optlist);
(kgdb) info loc
optlist = (struct vfsoptlist *) 0xc5544160
iov_errmsg = (struct iovec *) 0x0
fstype = 0xc4cb8bc0 "ufs"
fspath = 0xc4c3bc70 "/mnt"
error = 0x0
fstypelen = 0x4
fspathlen = 0x5
i = 0x0
(kgdb) p *optlist
$1 = {tqh_first = 0xc4e48300, tqh_last = 0xc54c3440}
magic 19540119 (UFS2) time Mon Nov 14 19:29:40 2005
superblock location 65536 id [ 4378d794 a42f9b8c ]
ncg 4 size 1000 blocks 799
bsize 8192 shift 13 mask 0xffffe000
fsize 1024 shift 10 mask 0xfffffc00
frag 8 shift 3 fsbtodb 1
minfree 8% optim time symlinklen 120
maxbsize 8192 maxbpg 1024 maxcontig 16 contigsumsize 16
nbfree 97 ndir 2 nifree 249 nffree 17
bpg 32 fpg 256 ipg 64
nindir 1024 inopb 32 maxfilesize 8804691443711
sbsize 2048 cgsize 1024 csaddr 104 cssize 1024
sblkno 72 cblkno 80 iblkno 536871000 dblkno 104
cgrotor 0 fmod 0 ronly 0 clean 0
avgfpdir 64 avgfilesize 16384
flags soft-updates
fsmnt /mnt
volname swuid 0
cs[].cs_(nbfree,ndir,nifree,nffree):
(16,2,57,17) (28,0,64,0) (28,0,64,0) (25,0,64,0)
blocks in last group 29
cg 0:
magic 90255 tell 14000 time Mon Nov 14 19:29:40 2005
cgx 0 ndblk 256 niblk 64 initiblk 64
nbfree 16 ndir 2 nifree 57 nffree 17
rotor 0 irotor 6 frotor 104
frsum 0 0 1 0 0 0 2
sum of frsum: 17
clusters 1-8: 0 0 0 0 0 0 0 0
clusters 9-15: 0 0 0 0 0 0 0
clusters size 16 and over: 1
clusters free: 16-31
inodes used: 0-6
blks free: 109-111, 113-119, 121-255
cg 1:
magic 90255 tell 54000 time Mon Nov 14 19:29:40 2005
cgx 1 ndblk 256 niblk 64 initiblk 64
nbfree 28 ndir 0 nifree 64 nffree 0
rotor 0 irotor 0 frotor 0
frsum 0 0 0 0 0 0 0
sum of frsum: 0
clusters 1-8: 0 0 0 0 0 0 0 0
clusters 9-15: 1 0 0 0 0 0 0
clusters size 16 and over: 1
clusters free: 0-8, 13-31
inodes used:
blks free: 0-71, 104-255
cg 2:
magic 90255 tell 94000 time Mon Nov 14 19:29:40 2005
cgx 2 ndblk 256 niblk 64 initiblk 64
nbfree 28 ndir 0 nifree 64 nffree 0
rotor 0 irotor 0 frotor 0
frsum 0 0 0 0 0 0 0
sum of frsum: 0
clusters 1-8: 0 0 0 0 0 0 0 0
clusters 9-15: 1 0 0 0 0 0 0
clusters size 16 and over: 1
clusters free: 0-8, 13-31
inodes used:
blks free: 0-71, 104-255
cg 3:
magic 90255 tell d4000 time Mon Nov 14 19:29:40 2005
cgx 3 ndblk 232 niblk 64 initiblk 64
nbfree 25 ndir 0 nifree 64 nffree 0
rotor 0 irotor 0 frotor 0
frsum 0 0 0 0 0 0 0
sum of frsum: 0
clusters 1-8: 0 0 0 0 0 0 0 0
clusters 9-15: 1 0 0 0 0 0 0
clusters size 16 and over: 1
clusters free: 0-8, 13-28
inodes used:
blks free: 0-71, 104-231
$ fsck -y /dev/md0c
** /dev/md0c
BAD SUPER BLOCK: VALUES IN SUPER BLOCK DISAGREE WITH THOSE IN FIRST ALTERNATE
LOOK FOR ALTERNATE SUPERBLOCKS? yes
16 is not a file system superblock
SEARCH FOR ALTERNATE SUPER-BLOCK FAILED. YOU MUST USE THE
-b OPTION TO FSCK TO SPECIFY THE LOCATION OF AN ALTERNATE
SUPER-BLOCK TO SUPPLY NEEDED INFORMATION; SEE fsck(8).